Talk back is a feature that enables the sound being picked up from the mic (your voice) to be played back through the headphones (speakers). So you can hear your own voice. Its really nice when you have noise canceling ear cuffs on the headsets. its also known as Selective Voice Monitoring, and Mic Monitor. Again, this is a must. But then again, I may have to decide which is more important: SVM, or surround sound.